I received my new J3 today. I have no reason to think that it is anything other than brand new, as the retail packaging seemed unopened and the factory screen protector film was mint.

I charged it for the recommended 3.5 hours this afternoon, as per the user manual. In fact, I charged it for 5 hours. I knew it was charging because the icon appeared on screen and the I was using a reliable USB charger plug.

Immediately upon disconnecting the J3 from the charger, I then begin using it for the first time.

But within 10 minutes, I was told that the battery was low and the unit then switched itself off automatically. It did this several times consecutively until it then refused too switch on.

Incidentally, when is turn the J3 on the battery icon at the top displays that it is full. Within 30 seconds the icon then changes to empty.